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gut metabolome

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https://www.readbyqxmd.com/read/28437060/high-throughput-and-quantitative-measurement-of-microbial-metabolome-by-gas-chromatography-mass-spectrometry-using-automated-alkyl-chloroformate-derivatization
#1
Linjing Zhao, Yan Ni, Mingming Su, Hongsen Li, Fangcong Dong, Wenlian Chen, Runmin Wei, Lulu Zhang, Seu-Ping Guiraud, François-Pierre J Martin, Cynthia Rajani, Guoxiang Xie, Wei Jia
The ability to identify and quantify small molecule metabolites derived from gut microbial-mammalian co-metabolism is essential for the understanding of the distinct metabolic functions of the microbiome. To date, analytical protocols that quantitatively measure a complete panel of microbial metabolites in biological samples have not been established, but urgently needed by the microbiome research community. Here, we report an automated high-throughput quantitative method using a gas chromatography/time-of-flight mass spectrometry (GC/TOFMS) platform to simultaneously measure over one hundred microbial metabolites in human serum, urine, feces and Escherichia coli cell samples within 15 minutes per sample...
April 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28436478/tissue-accumulation-of-microplastics-in-mice-and-biomarker-responses-suggest-widespread-health-risks-of-exposure
#2
Yongfeng Deng, Yan Zhang, Bernardo Lemos, Hongqiang Ren
Microplastics (MPs) are a significant environmental health issue and increasingly greater source of concern. MPs have been detected in oceans, rivers, sediments, sewages, soil and even table salts. MPs exposure on marine organisms and humans has been documented, but information about the toxicity of MPs in mammal is limited. Here we used fluorescent and pristine polystyrene microplastics (PS-MPs) particles with two diameters (5 μm and 20 μm) to investigate the tissue distribution, accumulation, and tissue-specific health risk of MPs in mice...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28434033/the-gut-microbiome-as-a-target-for-prevention-and-treatment-of-hyperglycaemia-in-type-2-diabetes-from-current-human-evidence-to-future-possibilities
#3
REVIEW
Louise Brunkwall, Marju Orho-Melander
The totality of microbial genomes in the gut exceeds the size of the human genome, having around 500-fold more genes that importantly complement our coding potential. Microbial genes are essential for key metabolic processes, such as the breakdown of indigestible dietary fibres to short-chain fatty acids, biosynthesis of amino acids and vitamins, and production of neurotransmitters and hormones. During the last decade, evidence has accumulated to support a role for gut microbiota (analysed from faecal samples) in glycaemic control and type 2 diabetes...
April 22, 2017: Diabetologia
https://www.readbyqxmd.com/read/28432876/effect-of-pistachio-consumption-on-the-modulation-of-urinary-gut-microbiota-related-metabolites-in-prediabetic-subjects
#4
Pablo Hernández-Alonso, Daniel Cañueto, Simona Giardina, Jordi Salas-Salvadó, Nicolau Cañellas, Xavier Correig, Mònica Bulló
The specific nutritional composition of nuts could affect different metabolic pathways involved in a broad range of metabolic diseases. We therefore investigated whether chronic consumption of pistachio nuts modifies the urine metabolome in prediabetic subjects. We designed a randomized crossover clinical trial in 39 prediabetic subjects. They consumed a pistachio-supplemented diet (PD, 50% carbohydrates, 33% fat, including 57 g/d of pistachios daily) and a control diet (CD, 55% carbohydrates, 30% fat) for 4 months each, separated by a 2-week wash-out...
April 12, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28420790/honeybee-gut-microbiota-promotes-host-weight-gain-via-bacterial-metabolism-and-hormonal-signaling
#5
Hao Zheng, J Elijah Powell, Margaret I Steele, Carsten Dietrich, Nancy A Moran
Social bees harbor a simple and specialized microbiota that is spatially organized into different gut compartments. Recent results on the potential involvement of bee gut communities in pathogen protection and nutritional function have drawn attention to the impact of the microbiota on bee health. However, the contributions of gut microbiota to host physiology have yet to be investigated. Here we show that the gut microbiota promotes weight gain of both whole body and the gut in individual honey bees. This effect is likely mediated by changes in host vitellogenin, insulin signaling, and gustatory response...
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28402995/etiopathogenesis-of-inflammatory-bowel-disease-today-and-tomorrow
#6
Heitor S P de Souza
PURPOSE OF REVIEW: Crohn's disease and ulcerative colitis, the two major forms of inflammatory bowel disease (IBD), represent chronic diseases of unknown cause, and they are regarded as prototypical complex diseases. Despite all the recent advances, a complete appreciation of the pathogenesis of IBD is still limited. In this review, we present recent information contributing to a better understanding of mechanisms underlying IBD. RECENT FINDINGS: Here, we attempt to highlight novel environmental triggers, data on the gut microbiota, its interaction with the host, and the potential influence of diet and food components...
April 11, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28401628/metabolomics-reveals-new-metabolic-perturbations-in-children-with-type-1-diabetes
#7
Alfonso Galderisi, Paola Pirillo, Vittoria Moret, Matteo Stocchero, Antonina Gucciardi, Giorgio Perilongo, Carlo Moretti, Carlamaria Monciotti, Giuseppe Giordano, Eugenio Baraldi
OBJECTIVE: Using an untargeted metabolomics approach we investigated the metabolome of children with type 1 diabetes (T1D) in comparison with healthy peers and explored the contribution of HbA1c and clinical features to the observed difference. RESEARCH DESIGN AND METHODS: We enrolled children with T1D aged 6-15 years, attending the pediatric diabetes clinic of University of Padova (Italy). Healthy controls were enrolled on voluntary basis and matched for age, sex, pubertal status, body mass index (BMI)...
April 12, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28400091/metabolomic-changes-demonstrate-reduced-bioavailability-of-tyrosine-and-altered-metabolism-of-tryptophan-via-the-kynurenine-pathway-with-ingestion-of-medical-foods-in-phenylketonuria
#8
Denise M Ney, Sangita G Murali, Bridget M Stroup, Nivedita Nair, Emily A Sawin, Fran Rohr, Harvey L Levy
BACKGROUND: Deficiencies of the monoamine neurotransmitters, such as dopamine synthesized from Tyr and serotonin synthesized from Trp, are of concern in PKU. Our objective was to utilize metabolomics analysis to assess monoamine metabolites in subjects with PKU consuming amino acid medical foods (AA-MF) and glycomacropeptide medical foods (GMP-MF). METHODS: Subjects with PKU consumed a low-Phe diet combined with AA-MF or GMP-MF for 3weeks each in a randomized, controlled, crossover study...
April 6, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28397877/indolepropionic-acid-and-novel-lipid-metabolites-are-associated-with-a-lower-risk-of-type-2-diabetes-in-the-finnish-diabetes-prevention-study
#9
Vanessa D de Mello, Jussi Paananen, Jaana Lindström, Maria A Lankinen, Lin Shi, Johanna Kuusisto, Jussi Pihlajamäki, Seppo Auriola, Marko Lehtonen, Olov Rolandsson, Ingvar A Bergdahl, Elise Nordin, Pirjo Ilanne-Parikka, Sirkka Keinänen-Kiukaanniemi, Rikard Landberg, Johan G Eriksson, Jaakko Tuomilehto, Kati Hanhineva, Matti Uusitupa
Wide-scale profiling technologies including metabolomics broaden the possibility of novel discoveries related to the pathogenesis of type 2 diabetes (T2D). By applying non-targeted metabolomics approach, we investigated here whether serum metabolite profile predicts T2D in a well-characterized study population with impaired glucose tolerance by examining two groups of individuals who took part in the Finnish Diabetes Prevention Study (DPS); those who either early developed T2D (n = 96) or did not convert to T2D within the 15-year follow-up (n = 104)...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28397590/disease-and-the-gut-microbiome-the-role-of-metabolomic-analysis
#10
J O Hunter, R H Warning
No abstract text is available yet for this article.
April 2017: Journal of the Royal Society of Medicine
https://www.readbyqxmd.com/read/28396122/evaluation-of-the-impact-of-gut-microbiota-on-uremic-solute-accumulation-by-a-ce-tofms-based-metabolomics-approach
#11
Eikan Mishima, Shinji Fukuda, Chikahisa Mukawa, Akinori Yuri, Yoshitomi Kanemitsu, Yotaro Matsumoto, Yasutoshi Akiyama, Noriko N Fukuda, Hiroki Tsukamoto, Kei Asaji, Hisato Shima, Koichi Kikuchi, Chitose Suzuki, Takehiro Suzuki, Yoshihisa Tomioka, Tomoyoshi Soga, Sadayoshi Ito, Takaaki Abe
Gut microbiota is involved in the metabolism of uremic solutes. However, the precise influence of microbiota to the retention of uremic solutes in CKD is obscure. To clarify this, we compared adenine-induced renal failure and control mice under germ-free or specific pathogen-free (SPF) conditions, examining the metabolite profiles of plasma, feces, and urine using a capillary electrophoresis time-of-flight mass spectrometry-based approach. Mice with renal failure under germ-free conditions demonstrated significant changes in plasma metabolites...
April 8, 2017: Kidney International
https://www.readbyqxmd.com/read/28392238/organochloride-pesticides-modulated-gut-microbiota-and-influenced-bile-acid-metabolism-in-mice
#12
Qian Liu, Wentao Shao, Chunlan Zhang, Cheng Xu, Qihan Wang, Hui Liu, Haidong Sun, Zhaoyan Jiang, Aihua Gu
Organochlorine pesticides (OCPs) can persistently accumulate in body and threaten human health. Bile acids and intestinal microbial metabolism have emerged as important signaling molecules in the host. However, knowledge on which intestinal microbiota and bile acids are modified by OCPs remains unclear. In this study, adult male C57BL/6 mice were exposed to p, p'-dichlorodiphenyldichloroethylene (p, p'-DDE) and β-hexachlorocyclohexane (β-HCH) for 8 weeks. The relative abundance and composition of various bacterial species were analyzed by 16S rRNA gene sequencing...
April 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28390093/understanding-the-role-of-the-gut-ecosystem-in-diabetes-mellitus
#13
REVIEW
Wanping Aw, Shinji Fukuda
Diabetes mellitus is a type of metabolic disorder patients are unable to regulate glycemia. It is currently worldwide public health issue and is a burden to society due to its disabling and common complications. Diabetes is multi-factorial and also induces the onset of other diseases. In this report, we will review the labyrinth encompassing the gut microbiota and gut microbiota derived metabolites on type 1 diabetes and type 2 diabetes pathogenesis. There has been exceptional improvements in Deoxyribonucleic acid (DNA) sequencing and mass spectrometry technologies throughout these years and this has allowed the comprehensive collection of information on our unique gut ecosystem...
April 8, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28389566/microbial-metabolites-in-health-and-disease-navigating-the-unknown-in-search-of-function
#14
Kristina B Martinez, Vanessa A Leone, Eugene B Chang
The gut microbiota has been implicated in the development of a number of chronic gastrointestinal and systemic diseases. These include inflammatory bowel diseases, irritable bowel syndrome, metabolic (i.e. obesity, non-alcoholic fatty liver disease, diabetes), and neurological diseases. The advanced understanding of host-microbe interactions has largely been due to new technologies such as 16S rRNA sequencing to identify previously unknown microbial communities and more importantly their functional characteristics through metagenomic sequencing, and other multi-omic technologies such as metatranscriptomics, metaproteomics, and metabolomics...
April 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28389555/targeting-of-microbe-derived-metabolites-to-improve-human-health-the-next-frontier-for-drug-discovery
#15
J Mark Brown, Stanley L Hazen
Recent advances in metabolomic and genome mining approaches have uncovered a poorly understood metabolome that originates solely or in part from bacterial enzyme sources. Whether living on exposed surfaces or within our intestinal tract, our microbial inhabitants produce a remarkably diverse set of natural products and small molecule metabolites that can impact human health and disease. Highlighted here, the gut microbe-derived metabolite trimethylamine N-oxide (TMAO) has been causally linked to the development of cardiovascular diseases...
April 7, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28387720/gene-diet-interaction-and-precision-nutrition-in-obesity
#16
REVIEW
Yoriko Heianza, Lu Qi
The rapid rise of obesity during the past decades has coincided with a profound shift of our living environment, including unhealthy dietary patterns, a sedentary lifestyle, and physical inactivity. Genetic predisposition to obesity may have interacted with such an obesogenic environment in determining the obesity epidemic. Growing studies have found that changes in adiposity and metabolic response to low-calorie weight loss diets might be modified by genetic variants related to obesity, metabolic status and preference to nutrients...
April 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28378586/gut-microbiota-modulation-attenuated-the-hypolipidemic-effect-of-simvastatin-in-high-fat-cholesterol-diet-fed-mice
#17
Xuyun He, Ningning Zheng, Jiaojiao He, Can Liu, Jing Feng, Wei Jia, Houkai Li
The hypolipidemic effect of simvastatin varies greatly among patients. In the current study, we investigated the gut microbial-involved mechanisms underlying the different responses to simvastatin. Male C57BL/6J mice were divided into control (Con), high-fat/cholesterol diet (HFD), antibiotic (AB), simvastatin (SV) and antibiotic_simvastatin (AB_SV) groups, respectively. At the end of the experiment, serum samples were collected for lipids and metabolomic analysis, and liver tissues for histology, gene and protein expression analysis...
April 10, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28372995/targeting-aggression-in-severe-mental-illness-the-predictive-role-of-genetic-epigenetic-and-metabolomic-markers
#18
REVIEW
Mirko Manchia, Vassilios Fanos
Human aggression is a complex and widespread social behavior that is overrepresented in individuals affected by severe mental illness (SMI), such as schizophrenia (SCZ), bipolar disorder (BD), autism spectrum disorder (ASD), and attention-deficit/hyperactivity disorder (ADHD). A substantial proportion of the liability threshold for aggressive behavior is determined by genetic factors, and environmental moderators might precipitate the manifestation of this behavioral phenotype through modification of gene expression via the epigenetic machinery...
April 2, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28360096/the-microbiome-of-professional-athletes-differs-from-that-of-more-sedentary-subjects-in-composition-and-particularly-at-the-functional-metabolic-level
#19
Wiley Barton, Nicholas C Penney, Owen Cronin, Isabel Garcia-Perez, Michael G Molloy, Elaine Holmes, Fergus Shanahan, Paul D Cotter, Orla O'Sullivan
OBJECTIVE: It is evident that the gut microbiota and factors that influence its composition and activity effect human metabolic, immunological and developmental processes. We previously reported that extreme physical activity with associated dietary adaptations, such as that pursued by professional athletes, is associated with changes in faecal microbial diversity and composition relative to that of individuals with a more sedentary lifestyle. Here we address the impact of these factors on the functionality/metabolic activity of the microbiota which reveals even greater separation between exercise and a more sedentary state...
March 30, 2017: Gut
https://www.readbyqxmd.com/read/28358020/nmr-based-metabolomics-reveals-alterations-of-electro-acupuncture-stimulations-on-chronic-atrophic-gastritis-rats
#20
Jingjing Xu, Xujuan Zheng, Kian-Kai Cheng, Xiaorong Chang, Guiping Shen, Mi Liu, Yadong Wang, Jiacheng Shen, Yuan Zhang, Qida He, Jiyang Dong, Zongbao Yang
Chronic atrophic gastritis (CAG) is a common gastrointestinal disease which has been considered as precancerous lesions of gastric carcinoma. Previously, electro-acupuncture stimulation has been shown to be effective in ameliorating symptoms of CAG. However the underlying mechanism of this beneficial treatment is yet to be established. In the present study, an integrated histopathological examination along with molecular biological assay, as well as (1)H NMR analysis of multiple biological samples (urine, serum, stomach, cortex and medulla) were employed to systematically assess the pathology of CAG and therapeutic effect of electro-acupuncture stimulation at Sibai (ST 2), Liangmen (ST 21), and Zusanli (ST 36) acupoints located in the stomach meridian using a rat model of CAG...
March 30, 2017: Scientific Reports
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